CN101691062B - Process for producing high-physical-property rubber type chlorinated polyethylene - Google Patents
Process for producing high-physical-property rubber type chlorinated polyethylene Download PDFInfo
- Publication number
- CN101691062B CN101691062B CN2009101960159A CN200910196015A CN101691062B CN 101691062 B CN101691062 B CN 101691062B CN 2009101960159 A CN2009101960159 A CN 2009101960159A CN 200910196015 A CN200910196015 A CN 200910196015A CN 101691062 B CN101691062 B CN 101691062B
- Authority
- CN
- China
- Prior art keywords
- screw rod
- chlorinated polyethylene
- time
- compression
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to a technique for modifying chlorinated polyethylene, in particular to a process for producing high-physical-property rubber type chlorinated polyethylene. The production process mainly comprises a mixing process of chlorinated polyethylene and various auxiliary agents, an extrusion process for compressing and shearing a mixed material for three times, and a milling process after extrusion. The invention aims to provide the process for producing the high-physical-property rubber type chlorinated polyethylene, which can modify the chlorinated polyethylene and make each performance of the chlorinated polyethylene comprehensively reach or even exceed that of chloroprene rubber. Compared with the prior art, the production process not only solves the technical problems of difficult demoulding of a mould-pressing product, product mold sticking, low vulcanization efficiency, air bubbles in products and the like encountered during processing a chlorinated polyethylene material, but also has the advantages of good effects of mixing, dispersing and plasticizing the material, the achievement of production sanitation, reduced cost and the like.
Description
Technical field
The present invention relates to chlorinated polyethylene modified technology, particularly a kind of process for producing high-physical-property rubber type chlorinated polyethylene.
Background technology
For many years, the manufacturing of auto parts machinery, machinery and industrial rubber articles etc. adopts neoprene as raw material always, and according to the consumption analysis of neoprene, 2005 was 6.4～6.5 ten thousand tons, increased to ten thousand tons of 7-8 by 2010 years.But owing to receive the restriction of Montreal international convention; Neoprene (CR), chlorosulfonated polyethylene (CSM) rubber and with utilize production technology that the carbon tetrachloride solvent method produces abroad developed country completely forbid already; China also will completely forbid use, thereby cause successively decreasing year by year of these product yields.Yet the market demand demonstrates the situation of sustainable growth but along with the fast development of global economy; For this reason, developed countries is explored new process one after another and is sought substitute products, and haloflex is exactly a kind of desirable substitution material; Haloflex is as a kind of chlorination elastomer material; Have the excellent comprehensive performance,, good fire-resistant, anti-ozone, heat-resistant aging, flame retardancy, resistance to chemical reagents and oil resistivity are arranged because it is not double bond containing chloride elastomer; And the production of chlorinated polyethylene cost is low, price is low, environmental pollution is little, is widely used in many aspects such as resin modified, rubber processing, coating, adhesive, engineering plastics at present.
Though domestic production of chlorinated polyethylene technology can have been produced the product of the multiple trade mark, product quality is also more reliable, and the kind of haloflex commodity is less on the market, and the overwhelming majority is the H135 type that is applied to chemical building material.And the research of haloflex at present mainly concentrates on aspects such as electric wire, sebific duct, adhesive tape, waterproof roll with application, and has obtained certain development.But totally it seems; Domestic application study to haloflex is still relatively backward; Especially also not enough in the research and development dynamics of high value added product product applications, particularly the haloflex material exists molded vulcanization product stripping difficulty, product to be prone to technical problems such as sticking to mould tool, sulfuration production efficiency is low, product is prone to bubble is arranged, product percent of pass is low in pressing is used.
Summary of the invention
The objective of the invention is that pressing demoulding difficulty, product sticking to mould, sulfuration efficient are low in order to run in the process that solves the haloflex material, product has technical problems such as bubble; Providing a kind of can make its each item performance meet or exceed the process for producing high-physical-property rubber type chlorinated polyethylene of neoprene with chlorinated polyethylene modified comprehensively.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of process for producing high-physical-property rubber type chlorinated polyethylene is characterized in that it is undertaken by following processing step:
(1) is mixed: haloflex and calcium zinc stabilizer, vulcanization active additive, plasticising softening agent, crosslinking agent, inner pattern releasing agent applicable are sent into homogenizer by the automatic sample conveying machine according to a certain ratio and puddled at a slow speed; The staving temperature is controlled in 40 ℃; Treat to transfer high-speed stirred to behind reinforced the finishing; The staving temperature is controlled in 95 ℃, shuts down after the control temperature stirs certain hour, and material is put into material-storage jar.
Described being mixed be meant before material mixing and cooperate according to the prescription after the scientific and reasonable proportioning, include in the prescription can guarantee material mixing with the required active principle of sulfuration processing.Guarantee the demoulding that can be good at after the pressing sulfuration, do not pollute mould, the mould that reduces in the sulfidation cleans cost, shortens cure time and enhances productivity.
(2) extrude: material is sent into double screw extruder by the quantitative feeder of self-priming; Material carries out three times compression and three times shearing at least in the screw rod of double screw extruder, material carries out the nature exhaust when shearing for the first time, and material is when shearing for the second time and for the third time; Utilize pumped vacuum systems to force to extract out moisture content and the lower-molecular substance in the material; After material was extruded, through cooling off, drying up, cut, the semi-finished product warehouse-in was for use.
Described vacuumizing is meant that the moisture content that discharged and the lower-molecular substance of material in mixing process forced to discharge by pumped vacuum systems; Can guarantee not contain moisture content and lower-molecular substance in the sizing material after mixing; Guarantee that elastomeric compound does not produce bubble after the pressing sulfuration, improve the qualification rate of product.
(3) mixing: during use, according to the material volume of mill mixing, proportionally add vulcanizing agent and carry out mixingly, roll spacing is at 0.3mm-0.5mm, thin logical 5 slices of triangle bag, and elastomeric compound is parked after 48 hours and is used.
Described compression and shearing segmentation are carried out; Compression for the first time adopts first section screw rod and the 3rd section screw rod of varying pitch to compress respectively with compression for the second time; Compression for the third time adopts the 5th section screw rod of uniform pitch to compress; Shear again after each compression; Shear for the first time by several stagger arrangement angles be 45 degree, etc. second section kneading disk screw rod constituting of the thick Roots's shape dish of dish shear, for the second time with shear for the third time respectively by several stagger arrangement angles be 60 spend, etc. the thick Roots's shape dish of dish the 4th section kneading disk screw rod and the 6th section kneading disk screw rod of constituting shear.
Described plasticising softening agent is a chlorinated paraffin, and it can improve the hardness of the processing characteristics adjustment product of CM.
Described crosslinking agent is the cyamelide triallyl, and it promotes the curingprocess rate of material when high temperature vulcanized.
Described vulcanization active additive is a magnesia, in sulfidation, vulcanizing agent is had its active function of raising.
Said cold resistant plasticizer is a dioctyl adipate, and it has plasticization effect, can improve cold tolerance.
Described inner pattern releasing agent applicable is a zinc stearate, after accomplishing sulfidation, can help product to reach good stripping result.
Described vulcanizing agent is a cumyl peroxide, and it makes material be cross-linked into the tridimensional network with good physical behavior through high temperature vulcanized back from common linear structure.
Described calcium zinc stabilizer have good lubricity and preferably glossiness, in sulfidation, can be good at improving the heat stabilization of material.
Described reinforcing filler is a carbon black, and it can play the adjustment material physical property.
Because the haloflex material is the full condensation material of height that does not have two keys, uses the mode of dynamic vulcanization that material is carried out modification, makes material have higher ozone resistance, tear resistance and hot strength.Make performance such as hot strength and the elongation at break of material behind aging and high temperature resistant deep fat have retentivity preferably through high-temperature hot air.Make its each item performance meet or exceed neoprene comprehensively.
Because whole process of production is not used any solvent, does not contain any violated harmful heavy metal, all material all adopts the production domesticization material, belongs to the environmental type product.Ability realization production cleans and reduces cost.
Because material carries out three compressions at least and shears for three times in the screw rod of double screw extruder; Prolong the time of staying of material at screw rod; Increased the material stirring extent, adopted two section pumped vacuum systems simultaneously, made material in extruding vulcanization process, can get rid of moisture content and some low molecular volatile matters in the material better; Make product properties unaffected, mould is not contaminated.
Description of drawings
Fig. 1 is present embodiment technological process of production figure.
Fig. 2 extrudes the half sectional view of core component list screw rod in the operation for present embodiment.
Fig. 3 is along the A-A amplification profile among Fig. 2.
Fig. 4 is along the B-B amplification profile among Fig. 2.
Fig. 5 is along the C-C amplification profile among Fig. 2.
The specific embodiment
To combine accompanying drawing and embodiment that the present invention is done further explain below.
As shown in Figure 1, present embodiment is undertaken by following processing step:
(1) is mixed: haloflex and calcium zinc stabilizer, reinforcing filler, vulcanization active additive, plasticising softening agent, crosslinking agent, inner pattern releasing agent applicable are sent into homogenizer by the automatic sample conveying machine according to a certain ratio and puddled at a slow speed; The staving temperature is controlled in 40 ℃; Treat to transfer high-speed stirred to behind reinforced the finishing; The staving temperature is controlled in 95 ℃, shuts down after the control temperature stirs certain hour, and material is put into material-storage jar.Wherein:
Described plasticising softening agent is a chlorinated paraffin, and it can improve the hardness of the processing characteristics adjustment product of CM.
Described crosslinking agent is the cyamelide triallyl, and it promotes the curingprocess rate of material when high temperature vulcanized.
Described vulcanization active additive is a magnesia, in sulfidation, vulcanizing agent is had its active function of raising.
Said cold resistant plasticizer is a dioctyl adipate, and it has plasticization effect, can improve cold tolerance.
Described inner pattern releasing agent applicable is a zinc stearate, after accomplishing sulfidation, can help product to reach good stripping result.
Described calcium zinc stabilizer have good lubricity and preferably glossiness, in sulfidation, can be good at improving the heat stabilization of material.
Described reinforcing filler is a carbon black, and it can play the adjustment material physical property.
(2) extrude: material is sent into double screw extruder by the quantitative feeder of self-priming; Material carries out three times compression and three times shearing at least in the screw rod of double screw extruder; And follow heating, and material carries out nature exhaust (K place structure in like Fig. 2) when shearing for the first time, and material is when shearing for the second time and for the third time; Utilize pumped vacuum systems to force to extract out moisture content and the lower-molecular substance (like J place structure among Fig. 2) in the material; After material was extruded, through cooling off, drying up, cut, the semi-finished product warehouse-in was for use.
Described compression and shearing segmentation are carried out; Compression for the first time and compression for the second time adopt first section screw rod D of varying pitch and the 3rd section screw rod F (like first section screw rod D and the 3rd section screw rod F among Fig. 2) to compress respectively; Compression for the third time adopts the 5th section screw rod H (like the 5th section screw rod H among Fig. 2) of uniform pitch to compress; Shear again after each compression; Shear for the first time by several stagger arrangement angles be 45 degree, etc. second section kneading disk screw rod E (like second section kneading disk screw rod E among Fig. 2, Fig. 4) of constituting of the thick Roots's shape dish of dish shear, for the second time with shear for the third time respectively by several stagger arrangement angles be 60 spend, etc. the 4th section kneading disk screw rod G constituting of the thick Roots's shape dish of dish and the 6th section kneading disk screw rod E (like the screw rod I among the four zone screw G among Fig. 2, Fig. 4 and Fig. 2, Fig. 5) shear.
(3) mixing: during use, according to the material volume of mill mixing, proportionally add vulcanizing agent carry out mixing, thin logical triangle bag, roll spacing is at 0.3mm-0.5mm, 5 slices of triangle bag are parked after 48 hours and are used.
Wherein, described vulcanizing agent is a cumyl peroxide, and it makes material be cross-linked into the tridimensional network with good physical behavior through high temperature vulcanized back from common linear structure.
Material gets into second operation work behind first procedure that is mixed, material enters into first section screw rod D from charge door M and carries out the compression first time.Because screw rod D is varying pitch screw, pitch from big to small, the appearance material space of charging aperture place screw rod is bigger, has eliminated the gap of material particles behind the material melting, reduces volume of material and diminishes to material axially-movable velocity effect.Material is under the promotion of screw rod; Because the back segment screw pitch of first section screw rod D diminishes; Receive the material of thermal softening to receive the intergranular air of discharge material rapidly of compression for the first time, and obtain high compression ratio, in whole screw sleeve, obtain axially-movable speed relatively uniformly simultaneously.
When material after compression for the first time, be fed forward to second section kneading disk screw rod E place, carry out the shearing first time, material receives violent shearing and stirring herein.Because herein because of material just has been heated deliquescing, and the screw rod that receives at this moment of material to squeeze pushing force little, thereby the gas main component of discharging is air, no pernicious gas, therefore the air of discharge directly is discharged in the atmosphere.
When material after shearing for the first time, be fed forward to the 3rd section screw rod F and carry out compression second time, owing to the 3rd section screw rod F also is varying pitch screw; Pitch from big to small, material is relaxed earlier before compression, the axial velocity that is fed forward reduces; Heat time heating time is elongated, and it is big that the material heating surface area becomes, and programming rate improves; When continuing forward, the back segment screw pitch of the 3rd screw rod diminishes, and material is compressed again; Be fed forward to the 4th section kneading disk screw rod G, material receives strong shearing and stirring for the second time, and moisture content and the lower-molecular substance in the material begins to overflow at this moment; And by corresponding pumped vacuum systems J pressure extraction, be discharged to after treatment in the atmosphere, material continues to be fed forward under the effect of screw rod; To the 6th section kneading disk screw rod J place, material receives strong shearing and stirring for the third time after the 5th section screw rod H heats up, and remaining trace water and lower-molecular substance begin to overflow in the material at this moment; And, be discharged in the atmosphere after treatment, thereby prevented that effectively pernicious gas directly is discharged in the atmosphere by corresponding pumped vacuum systems J pressure extraction.At last, material is extruded from cross-head N.
It is in order to guarantee material both by rapid heating and stirring that second section kneading disk screw rod E adopts 45 degree stagger arrangement angles, and can prevent does not again need bigger power of motor to drive because of material also melts this moment fully.The 4th section kneading disk screw rod G and the 6th section kneading disk screw rod I; Adopting 60 degree stagger arrangement angles is in order under high pressure to make material obtain bigger shear rate and violent stirring at the 4th section kneading disk screw rod G and the 6th section kneading disk screw rod I place; Make that material obtains more fully, more uniform heating and mixed effect; Material receives when shearing and can produce a large amount of shear heat simultaneously, and this heats up to material is favourable.
This that increases in the 6th section kneading disk screw rod I place vacuumizes operation together, is to be drawn out of fully in order to ensure the gas that contains in the material, and this is one of characteristics of the present invention.
Material gets into the mixing operation in the 3rd road behind the second road extrusion process, when mixing, according to the mill volume; Proportionally add the cumyl peroxide vulcanizing agent carry out mixing, thin logical triangle bag, roll spacing is at 0.3mm-0.5mm; 5 slices of triangle bag, elastomeric compound are parked after 48 hours and are used.
Described thin logical be meant rubber thickness very unfertile land utilize thin mechanical shear stress when logical to improve the melting effect of sizing material through two rollers of the machine of beginning to pratise, the each component in the elastomeric compound is uniformly dispersed.
Described triangle bag is meant the direction of motion that changes elastomeric compound through the method for manpower, and the each component in the elastomeric compound is fully disperseed.
It is in tension that described elastomeric compound is parked in the sizing material that is meant after just mixing molecule, needs the regular hour to park and shed intermolecular internal stress, reduces the distortion of sizing material, stablizes sulfuration shrinkage factor, hardness, abrasion and the hot strength etc. of sizing material.Simultaneously, let filler and auxiliary agent have sufficient time even diffused in the sizing material.
Performance test
Modified chlorinated polyethylene particle and existing neoprene particle that embodiment is made vulcanize injection-compression molding through vulcanization of rubber injection molding machine, make modified chlorinated polyethylene sheet material and neoprene sheet material respectively.Then modified chlorinated polyethylene sheet material and neoprene sheet material are carried out the performance comparison check, its result such as following table:
Can find out that by above test data the modified chlorinated polyethylene sheet material has good hot strength, good elongation at break, high-tear strength.Material has good physical property, shows that the rubber after the sulfuration has good mechanical strength and good toughness.And material high-temperature hot air aging with high temperature resistant deep fat after, property retention property such as the hot strength of material, elongation at break are better, are far superior to chloroprene rubber material.Simultaneously, have the incomparable ozone resistance of neoprene.Satisfy the instructions for use of elastomeric material fully.
In sum, the present invention compared with prior art has the following advantages:
1, can guarantee to discharge a large amount of moisture content and low molecular weight volatile thing in the material.
2, promote material mixing, improve the dispersion and the plasticizing effect of composite material.
3, realize that production cleans.Because whole process of production is not used any solvent, does not contain any violated harmful heavy metal, all material all adopts the production domesticization material, belongs to the environmental type product.Ability realization production cleans and reduces cost.
Claims (1)
1. process for producing high-physical-property rubber type chlorinated polyethylene is characterized in that it is undertaken by following processing step:
(1) is mixed: haloflex and calcium zinc stabilizer, reinforcing filler, vulcanization active additive, plasticising softening agent, crosslinking agent, inner pattern releasing agent applicable are sent into homogenizer by the automatic sample conveying machine according to a certain ratio and puddled at a slow speed; The staving temperature is controlled in 40 ℃; Treat to transfer high-speed stirred to behind reinforced the finishing; The staving temperature is controlled in 95 ℃, shuts down after the control temperature stirs certain hour, and material is put into material-storage jar;
Described plasticising softening agent is a chlorinated paraffin, and described crosslinking agent is the cyamelide triallyl, and described vulcanization active additive is a magnesia, and described inner pattern releasing agent applicable is a zinc stearate, and described vulcanizing agent is a cumyl peroxide;
(2) extrude: by the quantitative feeder of self-priming material is sent into double screw extruder, material carries out three times compression and three times shearing at least in the screw rod of double screw extruder, and follows heating; Material carries out the nature exhaust when shearing for the first time; Material utilizes pumped vacuum systems to force to extract moisture content and the lower-molecular substance in the material out, after material is extruded when shearing for the second time and for the third time; Through cooling off, drying up, cut, the semi-finished product warehouse-in is for use;
Described compression and shearing segmentation are carried out; Compression for the first time adopts first section screw rod D and the 3rd section screw rod F of varying pitch to compress respectively with compression for the second time; Compression for the third time adopts the 5th section screw rod H of uniform pitch to compress; Shear again after each compression; Shear for the first time by several stagger arrangement angles be 45 degree, etc. second section kneading disk screw rod E constituting of the thick Roots's shape dish of dish shear, for the second time with shear for the third time respectively by several stagger arrangement angles be 60 spend, etc. the thick Roots's shape dish of dish the 4th section kneading disk screw rod G and the 6th section kneading disk screw rod E of constituting shear;
(3) mixing: during use, according to the material volume of mill mixing, proportionally add vulcanizing agent carry out mixing, thin logical triangle bag, roll spacing is at 0.3mm-0.5mm, 5 slices of triangle bag, elastomeric compound is parked after 48 hours and is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101960159A CN101691062B (en) | 2009-09-19 | 2009-09-19 | Process for producing high-physical-property rubber type chlorinated polyethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101960159A CN101691062B (en) | 2009-09-19 | 2009-09-19 | Process for producing high-physical-property rubber type chlorinated polyethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101691062A CN101691062A (en) | 2010-04-07 |
| CN101691062B true CN101691062B (en) | 2012-07-25 |
Family
ID=42079805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101960159A Active CN101691062B (en) | 2009-09-19 | 2009-09-19 | Process for producing high-physical-property rubber type chlorinated polyethylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101691062B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276934A (en) * | 2010-06-10 | 2011-12-14 | 中原工学院 | Environmental-friendly CPE rubber sheathing material with low temperature resistance and oil-resistance and flame retardancy, and preparation method thereof |
| CN109337225A (en) * | 2018-10-25 | 2019-02-15 | 南昌航空大学 | A kind of preparation method of chlorinated polyethylene rubber |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037513A (en) * | 2006-03-14 | 2007-09-19 | 陶氏环球技术公司 | Modified sulfuration system combination and method for usage in sulfuration chlorination elastomer combination |
-
2009
- 2009-09-19 CN CN2009101960159A patent/CN101691062B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037513A (en) * | 2006-03-14 | 2007-09-19 | 陶氏环球技术公司 | Modified sulfuration system combination and method for usage in sulfuration chlorination elastomer combination |
Non-Patent Citations (2)
| Title |
|---|
| 任文坛，等.氯化聚乙烯橡胶的应用现状及前景.《橡胶科技市场》.2008,(第23期),13-17. * |
| 李昂.氯化聚乙烯橡胶(CM)的性能、加工与应用.《特种橡胶制品》.2003,第24卷(第1期),57-59. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101691062A (en) | 2010-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104893084B (en) | A kind of fibre reinforced polyethylene waterproof roll and preparation method | |
| CN100580023C (en) | Composition of nitrile rubber and polyformaldehyde and preparation method thereof | |
| CN204354342U (en) | Two continuously mixing feeding units of a kind of automobile-used waste and old GMT material recovery granulation | |
| CN101481463A (en) | Production method of hard polychloroethylene section bar soft-hard coextrusion rubber strip | |
| CN105566721A (en) | High-temperature-resistant XPE (chemical cross-linked polyethylene) foam and preparation method thereof | |
| CN109456563A (en) | A kind of UHMWPE alloy compatibilization and toughening modified polypropene ripple pipe as special material and preparation method thereof | |
| CN101691062B (en) | Process for producing high-physical-property rubber type chlorinated polyethylene | |
| CN105504594A (en) | Polyvinyl chloride plastic and preparation method thereof | |
| CN103396643A (en) | Modifier-containing polyacrylate grafted vinyl chloride composite resin composition | |
| CN1114571C (en) | Extruding-out and injection method for producing composite products of used plastics and powdered coal ash | |
| CN113527786B (en) | Ultrahigh molecular weight polyethylene composition and preparation method thereof, ultrahigh molecular weight polyethylene pipe and preparation method and application thereof, and composite pipe | |
| CN110819038B (en) | PVC sheet and preparation method thereof | |
| CN108127943A (en) | A kind of preparation method of dynamic vulcanization EPDM rubber waterproof rolling material | |
| CN102198687B (en) | Method for enhancing wood-plastic composite material | |
| CN109575480A (en) | A kind of wood-plastic board and preparation method thereof | |
| CN204658905U (en) | The extrusion device of flat two-shipper | |
| CN212072902U (en) | Screw structure for extruding and granulating high-strength glass fiber reinforced material | |
| CN111138784B (en) | CPVC prefabricated pipe for biaxial orientation and production method thereof, CPVC-O pipe and production method thereof | |
| CN103665904A (en) | Manufacturing method of wood-plastic composite material and profiles thereof | |
| CN101580625A (en) | Technology and process of cyclic utilization and cyclic remolding of waste thermosetting plastic (epoxide resin) | |
| CN105367929B (en) | The preparation method of ultra-toughness polystyrene acrylonitrile copolymer/thermoplastic elastomer (TPE)/rigid particles ternary blends | |
| CN106009631A (en) | High-temperature-resistant vacuum bag film LVF215R and preparation method thereof | |
| CN107286510A (en) | A kind of FRPVC co-extrusions electric power protecting pipe | |
| CN115339198A (en) | Organic reinforced positioning anti-drop double-seal pipe and preparation method thereof | |
| CN106751357A (en) | A kind of preparation method of SBS asphalt modifiers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |